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Cushion structure for vehicle seat

a vehicle seat and cushion structure technology, which is applied in the direction of vehicle components, vehicle arrangements, chairs, etc., can solve the problems of giving discomfort to the seated occupant of the vehicle, the hardness cannot be adjusted once the cushion foam is formed, etc., and achieves the effect of suppressing the local action, reducing the strength of the cushion pan (3), and reducing the tension of the band (41) consisting of a flexible material

Inactive Publication Date: 2013-10-03
VOLVO LASTVAGNAR AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a vehicle cushion structure that includes a flexible band. This band helps to adjust the tension of the cushion foam, similar to how a hardening ratio can be adjusted. The flexible band can follow the irregularity of the cushion pan and help to soften or harden the cushion foam, providing a comfortable and uniform support for the seated occupant. The band is designed to distributed the total deflection of the cushion foam evenly, reducing any discomfort or pressure on the occupant's backside. Additionally, the band can be adjusted easily by the occupant through a tension adjusting mechanism.

Problems solved by technology

Although hardness of cushion foam made from foaming resin can be adjusted by the foam size and the foaming ratio, its hardness cannot be adjusted once the cushion foam is formed.
Moreover, since abnormal sound is heard every time the rigid plate member 40 contacts with the (reinforcing rib 3t of the) steel cushion pan 3, it may give discomfort to the seated occupant of the vehicle.
This prior art, however, is intended for the hardness adjustment of the cushions of furniture chairs and cannot be applied to the cushions of vehicle seats.

Method used

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  • Cushion structure for vehicle seat
  • Cushion structure for vehicle seat
  • Cushion structure for vehicle seat

Examples

Experimental program
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Effect test

first embodiment

[0037]FIG. 7 shows the seat cushion 10 of the first embodiment in a situation that the hardness of the seat cushion 10 is increased. FIG. 7 shows the situation, for example, when the occupant has just seated and the vehicle is still in the stationary state. In the situation shown in FIG. 7, the tension acted on the band 4 consisting of a flexible material (the band body 41) is strong and the band 4 is not deflected generally.

[0038]FIG. 8 shows the situation that the hardness of the cushion seat 10 is decreased by operating (turning) the adjusting dial 55 of the seat cushion 10 shown in FIG. 7. Or, it shows the bounding situation of the vehicle in a manner that the hardness of the cushion seat 10 is decreased. In the situation shown in FIG. 8, the tension acted on the band consisting of a flexible material (band body 41) which supports the bottom 1b of the cushion foam 1 is small, and the cushion foam 1 and the band 4 deflect downward. In the state shown in FIG. 8, for example, even ...

third embodiment

[0051]In the third embodiment shown in FIG. 10, when the adjusting dial 55 is turned in the direction of arrow R1, the hook support rod 51B turns in the direction of arrow R2. Then, the band body 41B is wound up by the hook support rod 51B and the tension of the band 4B consisting of a flexible material (band body 41) is increased. On the other hand, if the adjusting dial 55 is turned in reverse direction, the tension of the band 4B consisting of a flexible material (band body 41) is decreased.

[0052]The constructions and the functional effects of the third embodiment, which are not mentioned above, are the same as that of the first embodiment.

[0053]The embodiments shown in the drawings are merely examples and are not intended to restrict the technical scope of the present invention.

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Abstract

The purpose of the present invention is to provide a cushion structure for a vehicle seat, the cushion structure allowing the hardness of the cushion to be adjusted according to an occupant's preference by simple operation. The present cushion structure for a vehicle seat has: a band (41) consisting of a flexible material, the band (41) being provided below the lower surface (1b) of a cushion foam and extending in the longitudinal direction of the seat; and a tension adjusting mechanism (5) for adjusting the tension of the band (41) consisting of a flexible material. The tension adjusting mechanism (5) adjusts the hardness of the cushion foam (1) by adjusting the tension of the band (41) consisting of a flexible material.

Description

TECHNICAL FIELD[0001]The present invention relates to a vehicle seat of a truck. More specifically, the present invention relates to a cushion of a vehicle seat.BACKGROUND ART[0002]Foaming resin is commonly used as material for seat cushion of a vehicle seat. Hardness and repulsion of cushion foam (so called “seat cushion”) will be changed by body weight and preference of the occupants. As for commercial vehicles used for sales activities, for example, unspecified numbers of drivers often drive the same vehicle and they sometimes argue hardness of the cushion foam. In this case, if the hardness of the cushion foam can be adjusted, it can not only satisfy the preference of the drivers but also can contribute to decreasing their work loads. Although hardness of cushion foam made from foaming resin can be adjusted by the foam size and the foaming ratio, its hardness cannot be adjusted once the cushion foam is formed.[0003]FIG. 11 is the sectional view of a seat cushion 10J which is an ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B60N2/70
CPCB60N2/7076B60N2/70B60N2/72
Inventor SEKI, KUNIO
Owner VOLVO LASTVAGNAR AB
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